<!DOCTYPE html>
<link rel="help" href="https://url.spec.whatwg.org/#interface-urlsearchparams">
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script>
function assert_type_error(f, msg) {
    assert_throws_js(TypeError, f, msg);
}

test(function() {
    var url = new URL('http://example.org/?a=b');
    var searchParams = url.searchParams;
    assert_true(url.searchParams === searchParams, 'Object identity should hold.');
}, 'URL.searchParams getter');

test(function() {
    var url = new URL('http://example.org/?a=b');
    var searchParams = url.searchParams;
    assert_equals(searchParams.toString(), 'a=b');

    searchParams.set('a', 'b');
    assert_equals(url.searchParams.toString(), 'a=b');
    assert_equals(url.search, '?a=b');
    url.search = '';
    assert_equals(url.searchParams.toString(), '');
    assert_equals(url.search, '');
    assert_equals(searchParams.toString(), '');
}, 'URL.searchParams updating, clearing');

test(function() {
    'use strict';
    var urlString = 'http://example.org';
    var url = new URL(urlString);
    assert_type_error(function() { url.searchParams = new URLSearchParams(urlString); });
    assert_type_error(function() { url.searchParams = null; });
    assert_type_error(function() { url.searchParams = 2; });
    assert_type_error(function() { url.searchParams = {}; });
}, 'URL.searchParams setter, invalid values');

test(function() {
    var url = new URL('http://example.org/file?a=b&c=d');
    var searchParams = url.searchParams;
    assert_equals(url.search, '?a=b&c=d');
    assert_equals(searchParams.toString(), 'a=b&c=d');

    // Test that setting 'search' propagates to the URL object's query
    // object.
    url.search = 'e=f&g=h';
    assert_equals(url.search, '?e=f&g=h');
    assert_equals(searchParams.toString(), 'e=f&g=h');

    // ..and same but with a leading '?'.
    url.search = '?e=f&g=h';
    assert_equals(url.search, '?e=f&g=h');
    assert_equals(searchParams.toString(), 'e=f&g=h');

    // And in the other direction; altering searchParams propagates
    // back to 'search'.
    searchParams.append('i', ' j ');
    assert_equals(url.search, '?e=f&g=h&i=+j+');
    assert_equals(url.searchParams.toString(), 'e=f&g=h&i=+j+');
    assert_equals(searchParams.get('i'), ' j ');

    searchParams.set('e', 'updated');
    assert_equals(url.search, '?e=updated&g=h&i=+j+');
    assert_equals(searchParams.get('e'), 'updated');

    var url2 = new URL('http://example.org/file??a=b&c=d');
    assert_equals(url2.search, '??a=b&c=d');
    assert_equals(url2.searchParams.toString(), '%3Fa=b&c=d');

    url2.href = 'http://example.org/file??a=b';
    assert_equals(url2.search, '??a=b');
    assert_equals(url2.searchParams.toString(), '%3Fa=b');
}, 'URL.searchParams and URL.search setters, update propagation');
</script>
